Weft bobbin for automatic weft supply



Jan. 14, 1936 E. EGLI ET AL 2,027,759

WEFT BOBBIN FOR AUTOMATIC WEFT SUPPLY Filed Nov. 22, 1954 Patented Jan 19 36 i i UNETED' srATrE PATEN; oFFicE.

WEF'E BOBBKN FQR AUTOMATIC WEFE SWPLY Eduard lEgli and Edwin Schoch, lltnti, Switzerland, assignors to Maschineniabrik Ruti vormals Caspar Heidegger, Ruti, Switzerland Application November 22, 1934, Serial No. 754,364

lln Switzerland November 29, 1933 ll Claim. (Cl. Ew -2M) in known weft carriers (Northrop pirns) for pirn, for instance for looms with'autotio looms with automatic change of bobbin, the change of bobbin, here shown as a fiat bobbin hold-fast member, provided with rings or beads, with a conical rear portion 2, and with two oppo= is round in shape. This shape has the disadsite feeler slots 3. The hold-fast member or vantage that the fresh .ibobbin to be inserted is spoolbutt dis exactly or approximately elliptical 5 liable to slip off upon the bobbin located in the in shape, and has atthe lower end two lateral shuttle,'thereby injuring the inner edges of the flattenings 5, which ensure a definite position in. shuttle I frame. It also has the disadvantage the bobbin magazine. The radius of curvature that the bobbin rotates, and a definite angular of the two opposite broad sides 6 is greater than 10 position in the shuttle cannot be attained. To half the distance between these two sides. The 10 I attain this definite position, as is required in two opposite narrow sides I of the substantially the case of bobbins with a feeler slot, and in elliptical cross section of the hold-fast member the case of fiat bobbins, various expedients. are I 4 are. flattened. The hold-fast end 4 -is pro- J adopted, such for exampleas providing guiding vided withholding'beads 8, which engage in holes in the hold-fast member of the bobbin, recesses in a-hold-fast springil of the shuttle I0, 15

. in which guiding pins on the weft hammer enshown in Figure 4.

gage, and also milling off the outermost hold- Owing to the shape of the hold-fast member fast part of the bobbin, and in conjunction of the bobbin in the manner described, the therewith providing introducing or holding jaws result is obtained that the latter is inserted in g 'in the shuttle. With all these expedients, howthe correct position in the shuttle without fur-J ever, it is not possible to attain the requisite ther trouble, that is to say, for example, with position of thebobbin in the shuttle satisfacthefeeler slot 3 in front, or, in thecase of flat torily and without disturbance, for either the. bobbins, with the broadside of the cop at the bobbin is rotated, or elsef it is only possibleto top. Owing to the flattened narrow sides] of constrain the bobbin to take up the correct pothe hold-fast membeml, the further result is 25 sition with a great expenditure of force. obtainedthat in the case of automatic weft sup- Now the present invention relates to a weft ply the fresh bobbin ll (Figure 5) to be inserted carrier (Northrop pirn) for automatic weft does not tendeto slip down upon the bobbin l2 supply, wherein the attaining of a definite angulocated in the shuttle in the transverse direction,

3o lar position of the carrier in the shuttle is and to, rotate about its own axis, whichlatter possible without resorting to special expedients, tendency would occur in the case of ordinary and the tendency of. the bobbin that is tobe bobbins with a round hold-fast member. v inserted to slip 01? upon the bobbin in the The beads 8 may consist of individual parts.

\ shuttle is counteracted. This weft carrier is In this case the. l tter arethemselves of the 3 distinguished by the fact that the, hold-fast shape described, asregards thehold-fast member 5 member provided with holding beads for the of the bobbin. prevention of twisting and slipping of the fresh The bobbin may consist of wood, metal, artiweft bobbin to be inserted, upon the weft bobbin ficial resin, or any other suitable material. still located in the shuttle, is made, exactly or What we claim is:' p 1 y 0 approximately elliptical in cross section. The A weft carrierfor looms with automatic 4 .narrow sides of the hold-fast member of subchange of bobbins, comprising flat front porstantially elliptical cross section are preferably 'tion with the long axis-in the horizontal direc flattened. Y \2 ,tion, to carry the weft,,a conical rear portion One constructional example of the invention having two opposite feeler slots, 9. solid hold-fast 5- is illustrated in the accompanying drawing, in. member provided with holding beads and elliptiwhich cal in cross section for; the;purpose of preventing Figure 1 fan plan, rotation and slipping of the fresh bobbin of weft Figure 2 an elevation, and to beins'erted upon the .weft bobbin still located 'Figure 3 a view from the left-hand end. in theshuttle, the narrow sides oiv the solid Figure 4 is a cross section through the shuttle hold-fast member being flattened "and the long 60 and the hold-fast member of the bobbin, and ,axis of the elliptical cross-section of the hold Figure 5 illustrates the position 'of I the weft fast nember being perpendicular to the long axis carriera'whenthe bobbinto be automatically of the flat cross-section of theweft ca ryi 'inserted strikes with the flattened narrow sideportion-of the weft carrier. r upon the bobbinin the shuttle. .I r

In the'drawlng, ,i denotes a'weft carrier or EDWIN BCHOCH.

EDUARD EGLI. as i 

